Valve

ABSTRACT

This disclosure describes a valve including a movable jet pipe, a receiver and a pressure responsive member. Fluid is supplied to the discharge end of the jet pipe and through first and second passages in the receiver to the fluid pressure responsive member. The receiver provides first and second outlet passages connected to the first and second passages, respectively, for returning fluid from the pressure responsive member.

United States Patent Inventors Harold Mandroian;

Chandler A. Phillips, La Canada; William D. Wilkerson, Santa Ana, Calif.Appl. No. 768,381 Filed Oct. 17, 1968 Patented Feb. 9, 1971 AssigneeBertea Corporation Irvine, Calif. a corporation of California VALVE 18Claims, 6 Drawing Figs.

U.S. Cl 137/608, 137/815 Int. Cl F1611 l/00 Field of Search 137/608,596.12, 596, 81.5; 91/3 References Cited UN lTED STATES PATENTS2,247,301 6/1941 Lesser 91/3 2,298,267 10/1942 Alderman et: a1.137/596.12X 2,904,057 9/1959 Callender et a1 9l/3X 3,199,535 8/1965 Baer137/596 3,225,780 12/1965 Warren et a1, 137/815 3,396,631 8/1968Woodward 91/3 3,410,291 11/1968 Boothe et al.. 137/596X 3,448,481 6/1969Jones, Jr.... 91/3X 3,468,220 9/1969 Lazar 91/3 Primary Examiner-SamuelScott Attorney-Smyth, Roston & Pavitt ABSTRACT: This disclosuredescribes a valve including a movable jet pipe, a receiver and apressure responsive member. Fluid is supplied to the discharge end ofthe jet pipe and through first and second passages in the receiver tothe fluid pressure responsive member. The receiver provides first andsecond outlet passages connected to the first and second passages,respectively, for returning fluid from the pressure responsive member.

PATENTEUFEB SIS?! 35 475 snm 2 OF 2 VALVE BACKGROUND OF THE INVENTIONJet pipe control valves typically include a movable jet pipe incommunication with fluid under pressure, a receiver, and an actuatingdevice or fluid pressure responsive member such as a fluid motor orpiston-type actuator. The receiver typically defines .two receiverpassages which may be connected, respectively, to opposite sides of thefluid responsive member. In operation the jet pipe is moved to supplyfluid to one or both of the receiver passages whereupon the receivercauses appropriate quantities of fluid to be conducted to the fluidpressure responsive member to cause the desired movement.

Several general operational conditions of the jet pipe control valve arepossible. In the full flow to load condition, all of the fluid underpressure is supplied to the pressure responsive member through onepassage of the receiver and all of the fluid returns through the otherpassage of the receiver. In a part flow to load condition, a portion ofthe supply fluid is supplied to the pressure responsive member throughone receiver passage and the balance or excess of the supply fluid isdirected toward the second receiver passage. All return flow occursthrough the second receiver passage and impinges against the fluid beingsupplied to such passage. In the blocked condition, no fluid enterseither of the receiver passages and all of the fluid bypasses thereceiver or flows out from underneath the nozzle to return. Thus, withprior art valves of this type, the same two passages in the receiverserve as both discharge end of the jet pipe and the receiver rather thanon tering the receiver causes a force to be applied to the jet pipe.This is undesirable inthat it may cause movement of the jet pipe and/orthe receiver thereby producing an error in the proportioning of thefluid to the two passages of the receiver. Furthermore, when the returnfluid impinges against the excess supply fluid, significant forces areapplied to the 'jet pipe. This may cause movement or instability of thejet pipe.

It is desirable to size the inlet and outlet of the two receiverpassages to obtain optimum flow characteristics. Thus, in sizing thereceiver passages for use as supply passages, the end portions thereofadjacent the jet pipe should be sized as inlets and-have a relativelysmall cross-sectional area. However, in sizing the same passages for useas returns, the end portions thereof adjacent the jet pipe should besized for an outlet and have a relatively large cross-sectional areawhich gradually enlarges as it extends toward the jet pipe. Thus, thesizing of these passages must be a compromise and optimum flowconditions are not approached. I

SUMMARY OF THE INVENTION The present invention prevents the return fluidfrom causing control valve error and instability by providing separateoutlet passages in the receiver for the return fluid. The outletpassages conduct the return fluid to locations which are spacedsufficiently from the jet pipe so that fluid discharged from the outletpassages do not materially affect jet pipe position or stability. Inaddition, the outlet passages conduct at least the greater portion ofthe excess supply fluid to return to thereby substantially reducebypassing of the supply fluid beneath the jet pipe.

A receiver constructed in accordance with the teachings of the presentinvention may include a body having first and second receiver passagesextending there through. Each of the first and second receiver passageshave an inlet section adjacent the discharge end of the jet pipe forreceiving fluid under pressure from the jet pipe and an outlet sectionfor supplying fluid under pressure or velocity to the fluid pressureresponsive member. As a practical matter the pressure of the fluidreceived by the inlet section from the jet pipe will be substantiallyentirely velocity head. Each of the receiver passages have anintermediate region or intermediate section lying intermediate the inletsection and outlet section.

The body also defines first and second outlet passages which extend,respectively, from the intermediate sections of the first and secondreceiver passages to locations on the outer surface of the body. Fluidreturning from the pressure responsive member returns through the outletsection, the intermediate section and the outlet passage.

To assure that fluid discharged from the outlet passage does not impingeagainst the jet pipe, each of the outlet passages should conduct thereturn fluid along a path to avoid interference with the jet pipe.Preferably, the outlet passages terminate at locations on the outersurface of the body which are spaced from the inlet sections and whichare spaced sufficiently from the normal positions of the jet pipe so asto avoid interference therewith. By preventing the return fluid fromimpinging against the jet pipe, control valve error and instability canbe eliminated.

It is important to. assure that return flow enters the outlet passagerather than the inlet section and with the present invention, severalfactors contribute to thisresult. First, the intermediate section shouldbe positioned relative to the outlet passage and the inlet section sothat return fluid is substantially entirely caused to flow through theoutlet passage rather than through the inlet section. Preferably, theintermediate section forms a nozzle for directing the return fluid intothe outlet passage. Preferably the nozzle includes a substantiallystraight region adjacent the outlet passage for directing return fluidinto the outlet passage. The receiver has a first surface which definesone side of the outlet, intermediate and inlet sections, a secondsurface which defines the opposite side of the inlet section and a thirdsurface which defines one side of the outlet passage. The second andthird surfaces intersect at a preselected zone of intersection whichlies approximately on a line drawn tangent to the first surface at theintermediate section.

Secondly, the present invention also teaches that it is desirable tomaintain the cross-sectional area of the intermediate section at aminimum to thereby increase the velocity and decrease the staticpressure of the return fluid. This further assures that the return fluidwill not-flow into the inlet section.

To further assure that the return fluid will flow through the outletpassage rather than into the inlet section, the outlet passage can beconstructed to afford a lesser resistance to reverse fluid flow than theinlet passage. To this end, the length of the outlet passage may be lessthan the length of the inlet section and the cross-sectional area of amajor portion of the outlet passage is preferably greater than thecross-sectional area of the inlet passage. In addition, the fluidadjacent of the inlet section is at supply pressure and the fluidadjacent the outlet of the outlet passage is at a relatively low returnpressure. Thus, there is a greater tendency for the fluid to exitthrough the outlet passage.

Another advantage of the present invention is that the inlet section canbe sized for use solely as an inlet whereas heretofore, thecross-sectional area of the inlet section was a compromise between thedesired inlet and outlet sizes. Accordingly, the inlet section of thepresent invention preferably has a relatively small cross-sectional areato maintain high velocity and low static pressure of the supply fluid.Such conditions are maintained through the intermediate section to theoutlet section at which the cross-sectional area increases to recoverstatic pressure and to lower the velocity of the supply fluid.

The concepts of this invention are also applicable to receivers havingonly a single receiver passage. For example, it is sometimes necessaryto supply fluid under pressure to only a single side of an actuatorwhere the opposite side of the piston has a substantially constantpressure acting against it. In this instance only a single receiverpassage is required.

To facilitate production, the concepts of the present invention canadvantageously be embodied in a receiver including first and second bodysections and a divider sandwiched between the body sections. Thesurfaces of each of the body sections confronting the divider havegroove means therein. Each of the groove means cooperate with thedivider to define a receiver passage and an outlet passage substantiallyas described hereinabove. The divider is preferably in the form of athin platelike element and forms a partition between the confrontingsurfaces of the body section. With this construction the two inletsections are preferably located closely adjacent each other and theoutlet passages terminate at locations spaced circumferentially from.the associated inlet sections.

The invention, both as to its organization, and method of operationtogether with further features and advantages thereof may best beunderstood by reference to the following description taken in connectionwith the accompanying illustrative drawings.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a partially schematic frontelevational view of a valve constructed in accordance with the teachingsof this invention.

FIG. 2 is an end elevational view, partially in section of the receivertaken generally along line 2-2 of FIG. 1.

FIG. 3 is an end elevational view taken along line 3-3 of FIG. 1 andillustrating an end face of one of the body sections.

FIG. 3A is a view similar to FIG. 3' with the corresponding receiverpassage and outlet passage of the other body section shown in dashedlines.

FIG. 4 is an enlarged fragmentary sectional view taken along line 4-4 ofFIG. 3 and illustrating the cross-sectional shape of the inlet sectionand one of the receiver passages.

FIG. 5 is a fragmentary sectional view taken along line 5-5 of FIG. 3.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings andin particular to FIG. 1 thereof reference numeral 11 designates a valveconstructed in accordance with the teachings of this invention.Generally, the valve 11 includes a jet pipe 13, a receiver 15, and anactuating device 17 which is shown schematically in FIG. 1. The jet pipe13 includes a tube 19 having a passage 21 extending therethrough andterminating at one end in a reduced crosssectional area nozzle 23. Inthe embodiment illustrated, the jet pipe P3 is mounted on a fixedmounting member 25 for pivotal movement about an axis 26 relative to thereceiver 15. Although it is necessary that the jet pipe 13 and thereceiver 15 be relatively movable, any other suitable means foraccomplishing such relative movement may be utilized, if desired. Forexample, the jet pipe 13 and receiver 15 experience linear relativemovement.

The actuating device 17 may be any fluid pressure responsive device suchas an actuator, fluid motor, etc. By way of example, the actuatingdevice may include a cylinder 27 having a fluid pressure responsivemember or piston 29 slidably mounted therein. The piston 29 may beconnected by a rod 30 to an external member (not shown) to perform someuseful function such as control function. The conduits 31 and 33 connectthe opposite ends of the cylinder 27 to the receiver 17. By supplyingfluid under pressure through, for example, the conduit 31 while allowingfluid to return through the conduit 33, the piston 29 can be moved tothe right as shown in FIG. 1.

The receiver 15 supplies fluid under pressure from the jet pipe 13 tothe actuating device 17 and also returns fluid from the actuating device17 to a suitable return system. The jet pipe 13 and the receiver 15 canbe suitably mounted in any suitable manner within a case 34 shownschematically in FIG. 1. The conduits 31 and 33 project through the case34 and the conduits and case are appropriately sealed to prevent leakageinto the case. The jet pipe 13 is spaced from the receiver very slightly(the spacing shown in FIG. 1 being exaggerated) so that the fluid underpressure supplied by the jet pipe can traverse this gap. The jet pipe 13supplies fluid under pressure, which is substantially all velocity head,to the receiver through a thin layer of fluid intermediate the jet pipeand the receiver.

A suitable conduit 34b provides a connection between the case 34 and asuitable sump (not shown).

and 37 and a divider 39 sandwiched between the body sections. The bodysections 35 and 37 have substantially planar end faces 41 and 43,respectively, in which groove means 45 and 47 (FIG. 3A) are formed. Thebody sections 35 and 37 are suitably interconnected with the end faces41 and 43 in confronting relationship, and with the divider tightlyclamped between the end faces. The divider 39 is in the form of a thindisc or partition. The groove means 45 and 47 cooperate with the divider39 to deflnereceiver passages 49 and 51, (FIG. 3A) respectively.

The passages 49 and 51 are preferably mirror images of each other whenviewed from the same side and are preferably arranged as shown in FIG.3A. With reference to FIG. 3, the receiver passage 49 includes an inletsection 53, an outlet section 55 and an intermediate section 57. Theinlet section 53 terminates at the outer surface of the body section 35in an inlet 59 and the outlet section 55 terminates at the outer surface of the outlet sections 55 in an outlet 61.

The grooves 45 and 47 also cooperate with the divider 39 to defineoutlet passages 63 and 65, (FIG. 3A) respectively. As best seen in FIG.3, the outlet passage 63 extends from the intermediate section 57generally radially outwardly and terminates in an outlet 67 in the outersurface of the-body section 35. The cross-sectional area of the outletpassage 63 progressively increases as it extends toward the periphery ofthe body section. The cross-sectional area of a major portion of thelength of the outlet passage 63 is greater than the cross-sectional areaof the inlet section 53.

The body section 35 has a relatively large groove 69 projecting radiallyinwardly and extending'axially therealong. In the embodimentillustrated, the outlet 67 opens into the groove 69 so that fluidreturning through the outlet passage 63 enters the groove 69. The groove69 which does not extend into the divider 39 shortens the outlet passage63 so that the latter is of lesser length than the inlet section 53. Asthe length and cross-sectional area of the outlet passage 63 are lessthan that of the inlet section 53, the outlet passage 63 provides alesser resistance to fluid flow than does the inlet section.

The inlet section 53 is preferably of relatively small crosssectionalarea to maintain fluid flowing therein at high velocity and low staticpressure. In the embodiment illustrated, the inlet section 53 extendsfrom the inlet 59 generally radially inwardly of the body section 35 andis curved slightly. The intermediate section 57 is substantiallystraight and is also of relatively smaller cross-sectional area tomaintain high velocity and low static pressure. The outlet section 55extends radially outwardly from the intermediate section and is curvedslightly in a direction opposite to the direction of curvature of theinlet section 53. The cross-sectional area of the outlet section 55progressively increases as it extends radially outwardly to therebyprovide for a reduction in fluid velocity and an increase in staticpressure. This increase in cross-sectional area of the outlet section 55is preferably brought about by an increase of groove width as shown inFIGS. 2 and 3 and an increase of groove depth as shown in FIG. 5. Apoint a is located in FIGS. 3 and 5 for reference purposes.

The outlet passage 63 has the inlet end thereof substantially inalignment with the straight intermediate section 57. Thus. fluidreturning from the outlet section 55 through the intermediate section 57tends to be directed through the outlet passage 63 rather than into theinlet section 53. That is, the fluid traveling through the intermediatesection 57 tends to continue moving in the same direction and thereforetends to exit through the outlet passage 63 rather than through theinlet section 63. Furthermore, because the intermediate section 57 is ofrelatively small cross-sectional area, the fluid flowing therethrough isat a relatively low static pressure and is traveling at high velocity.The high velocity fluid has a lesser tendency to undergo a change ofdirection. Because of the low static pressure, there is little pressureprovided which would tend to change the direction of the fluid stream byurging it into the inlet section 53.

The passages 49 and 51 are identical except that one is the mirror imageof the other when viewed from the same side in FIG. 3A. Portions of thepassage 51 corresponding to the passage 49 are designated withcorresponding reference characters followed by a letter'a. The outletpassage 65a terminates in a groove 69a in the body section 37. Thegroove 69a is circumferentially offsetfrom the groove 69 and the 45 and49 are preferably generally rectangular in cross section throughout thefull length thereof.-

As shown in FIG. 3, the surface 75 extends from one end of the passage49 to the other .and defines one side of the inlet section 53, theintermediate section 57 and the outlet section 55. The surface 73extends inwardly generally parallel to the surface 75 and terminatesalong a line b which appears as a point in FIG. 3. Another surface 79extends continuously along, and forms oneside of, the outlet section 55,the intermediate section 57 and the outlet passage 63. The other side ofthe outlet passage 63 is defined by a surface 81 which intersects thesurface 73 at the line b. Thus the line b defines a zone ofintersection.

Preferably the line b is intersected by a tangent line 0. The tangentline c is a line drawn tangent to the surface 75 at the intermediateregion 57. Specifically, the line 0 lies along one of the straight sidesof the intermediatesection 57. In the specific embodiment illustrated,the line b lies within about .001 inch of the line 0. This relationshipis important in assuring that a maximum amount'of the return fluid willflow from the intermediate section 57 into the outlet passage63 ratherthan into the inlet section'53.

If the zone of intersection b is moved to the left of the tan gent linec, to restrict the cross-sectional area of the intermediate section 57,the return fluid would tend to enter and flow through the inlet section53. If the zone of intersection b is moved to the right of the tangentline c, it undesirably restricts the cross-sectional area of the inletsection 53. Accordingly, it is preferred to maintain the zone ofintersection b as close as possible to the tangent line 0, because tothe extent that this relationship is not maintained either pinching offof the inlet section 53 or diversion of 'the return fluid into the inletpassage 53 will occur.

The body sections 35 and 37 may be secured together in any desiredmanner. It is important, however, that the passages 49 and 51 beoriented with the inlets 59 and 59a closely adjacent and preferablyaxially aligned. To accomplish this alignment pins 83 can be installedin axially extending grooves 85 in the body sections 35 and 37.

As shown in FIG. 1, the jet pipe 13 is mounted with the and areseparated only by the relatively thin divider 39.-The

l jet pipe 39 is connected to a source of fluid under pressure (notshown) and supplies this fluid to the inlets 59 and 59a.

The portion of fluid enteringeach of the inlets 59 and 59a depends uponthe position of the jet pipe 13 relative to the inlets. The divider 39divides the flow between the inlets 59 and 59a. The position of the jetpipe 13 relative to the receiver may be adjusted in any conventionalmanner.

Assuming that the jet pipe 13 is arranged to direct substantially all ofthe fluid into the inlet 59, such fluid flows at high velocity throughthe inlet section 53 and the intermediate section 57 to the outletsection 55 in which the velocity of the fluid is reduced and the staticpressure is increased. The fluid is transmitted through the conduit 3llto the cylinder'27 and acts on the left-hand end of the pist on 29 andto move the piston to the right. Such piston movement may perform anysuitable function such as a control function. Movement of the piston 29to the right expels fluid from the cylinder 27 on the right-hand side ofthe piston. Thus, fluid travels through the conduit 33 into the outletsection 55a of the passage 51. As the fluid travelsthrough theintermediate section 59a, the velocity is increased and the staticpressure isdecreased.

The return fluid travels from the intermediate section 570 into theoutlet passage 65. In the specific embodiment illustrated, numerousfactors combine to assure that the return fluid returns through theoutlet passage 65. Specifically, the orientation of the intermediatesection 570 relative to the inlet section 59a and the outlet passage65and the lesser resistance to fluid flow provided by the outlet passage65 as compared to the inlet section 53a are operative to cause thereturn fluid to enter the outlet passage 65. In addition, the fluidpressure adjacent the inlet 59a is at supply pressure whereas the fluidadjacent the outer end of the outlet passage 65 is at return pressure.This pressure differential further assures that the fluid returnsthrough the outlet passage 65.

The return fluid enters the groove 69a and the case 34 and may bepermitted to flow to a suitable sump (not shown) via the conduit 34b.The groove 71 which extends through the body sections 35 and 37 and thedivider 39 (FIGS. 1 and 2) provides a passageway for providingcommunication between the grooves 69 and 69a.

In the event that the position of the jet pipe 13 were adjusted so thatless than full flow was entering the inlet 59, a substantial portion ofthe balance of the fluid supplied to the jet pipe would enter the inlet59a and] travel through the inlet section 530 to the intermediatesection 57a at which point it would meet the fluid returning from thecylinder 27. In this event, the fluid supplied to the inlet 590 wouldalso exit through the outlet passage 65.

In the blocked condition, the piston 29 undergoes no movement eitherbecause equal pressures. are applied to the opposite sides thereof orbecause the piston is bottomed against one end of the cylinder 27. Inthe blocked condition, supply fluid enters both of the inlets 59 and 59aand is allowed to return through the outlet passages 63 and 65.

Although exemplary embodiments of the invention have been shown anddescribed, many changes, modifications and substitutions may be made byone having ordinary skill in the art without necessarily departing fromthe spirit and scope of this invention.

We claim: I. A receiver for a control valve of the type having movablemeans for supplying fluid under velocity head (through the discharge endthereof and) to the receiver to a fluid pressure responsive member andwherein the fluid can return through the receiver, said receivercomprising:

a body including first and second body sections, a platelike divider andmeans for interconnecting said body sections with said dividersandwiched therebetween each of said body sections having a surfaceconfronting said divider and groove means in said surface, said groovemeans of said first and second body sections cooperating with saiddivider to define first and second receiver passages, resplectively, andfirst and second outlet passages, respective y;

each of said first and second receiver passages having an inlet sectionadjacent the movable means for receiving fluid under velocity headtherefrom, an outlet section for supplying fluid under pressure to thepressure responsive member and for receiving return flow of fluid fromthe pressure responsive member, and an intermediate section intermediate,said inlet section and said outlet section, said first and secondreceiver passages terminating at both ends in the outer surfaces of saidfirst and second body sections, respectively; and

said first and second outlet passages extending from the intermediatesections of said first and second passages, respectively, to locationson the outer surfaces of said first and second body sections,respectively, and being spaced from said inlet sections, said outletpassages conducting return fluid from the associated intermediatesection to the exterior of said body.

2. A receiver as defined in claim 1 including a groove formed in theexterior surface of said body sections for providing a path ofcommunication on the exterior of said body between said first and secondoutlet passages.

3. A receiver as defined in claim 1 wherein said first body sectiondefines a first groove in the exterior surface thereof and said firstoutlet passage terminates in said first groove whereby the length ofsaid first outlet passage is reduced.

4. A receiver as defined in claim 1 wherein said outlet section of saidfirst receiver passage terminates in an outlet at the outer surface ofsaid first body section and the cross-sectional area of said outletsection of said first receiver passage progressively increases as itextends from the intermediate section of the first receiver passage tothe outlet of said first receiver passage, said last mentioned outletbeing of greater cross-sectional area than the intermediate section ofthe first receiver passage at the juncture of such intermediate andoutlet sections.

5'. A receiver as defined in claim 1 wherein said first receiver passageis generally rectangular in transverse cross section.

6. A receiver for a control valve of the type having movable means forsupplying fluid through the receiver to a fluid pressure responsivemember and wherein the fluid can return through the receiver, saidreceiver comprising:

a body having inner surface means defining a receiver passage extendingthrough said body, said body having an outer surface;

said receiver passage having an inlet section adjacent the movable meansfor receiving fluid therefrom, an outlet section for supplying fluidunder pressure to the pressure responsive member and for receivingreturn flow of fluid from the pressure responsive member, and anintermediate section intermediate said inlet section and said outletsection, said inlet section and said outlet section terminating at saidouter surface of said body in an inlet and an outlet, respectively;

said inner surface means for said body defining an outlet passageextending from said intermediate section of said receiver passage to alocation on the outer surface of said body spaced from said inlet;

said inlet and intermediate sections of said receiver passage and saidoutlet passage being oriented so that fluid flowing from said outletsection through the intermediate section tends to flow into the outletpassage rather than into the inlet section; and

the cross-sectional area of said intermediate section of said receiverpassage being smaller than the cross-sectional area of said outletwhereby the static pressure at said intermediate section is relativelylow.

7. A receiver as defined in claim 6 wherein said inner surface meansincludes a first surface defining one side of said outlet section, saidintermediate section and said inlet section(s), a second surfacedefining the opposite side of said inlet section and a third surfacedefining one side of said outlet passage, said second and third surfacesintersecting at a preselected zone, said zone and said first surfacebeing located so that a line drawn tangent to said first surface at saidintermediate section at least substantially intersects said zone.

8. A receiver as defined in claim 6 wherein the axis of saidintermediate section of said receiver passage is substantially straightand said outlet passage is joined to said intermediate section of saidreceiver passage adjacent the end thereof which is adjacent said inletsection.

9. A receiver as defined in claim 6 wherein said outlet passageterminates at said location in an outlet, the cross-sectional area ofsaid intermediate section of said receiver passage being less than thecross-sectional area of said last mentioned outlet.

10. A receiver as defined in claim 6 wherein said outlet sectionprogressively increases in cross-sectional area as it extends from saidintermediate section to said outlet.

11. A receiver for a control valve of the type having movable means forsupplying fluid through the receiver to a fluid pressure responsivemember and wherein the fluid can return through the receiver, saidreceiver comprising:

a body having inner surface means defining a receiver passage extendingthrough said body, said body having an outer surface;

said receiver passage having an inlet section adjacent the movable meansfor receiving fluid therefrom, an outlet section for supplying fluidunder pressure to the pressure responsive member and for receivingreturn flow of fluid from the pressure responsive member, and anintermediate section intermediate said inlet section and said outletsection, said inlet section and said outlet section terminating at saidouter surface of said body in an inlet and an outlet, respectively;

said inner surface means of said body defining an outlet passageextending from said intermediate section of said receiver passage to thelocation on the outer surface of said body spaced from said inlet;

said inlet and intermediate sections of said receiver passage and saidoutlet passage being oriented so that fluid flowing from said outletsection through the intermediate section tends to flow into the outletpassage rather than into the inlet section; and

the cross-sectional areas of said inlet section and said intermediatesection are smaller than the cross-sectional area of a portion of theoutletsection adjacent said outlet.

12. A receiver as defined in claim 11 wherein said outlet sectionprogressively increases in cross-sectional area as it extends from saidintermediate section to said outlet, said outlet passage terminates atsaid location in an outlet, the cross-sectional area of said outletpassage progressively increases as the outlet passage extends from theintermediate section to said outlet of the outlet passage.

13. A control valve comprising:

a jet pipe connectable to a supply of fluid under pressure, said jetpipe having a discharge end through which the fluid can be emitted;

a receiver having a receiver passage extending therethrough, saidreceiver passage having an inlet section adjacent the discharge end ofthe jet pipe for receiving fluid from the jet pipe, an outlet section,and an intermediate section, intermediate said inlet section and saidoutlet section;

means for mounting said receiver and said jet pipe for movement relativeto each other with the discharge end of the jet pipe lying, closelyadjacent said inlet section whereby movement of the jet pipe varies theamount of fluid directed toward the inlet section;

a pressure responsive member;

means for providing a fluid flow path between said outlet section ofsaid receiver passage and one side of said fluid responsive memberwhereby fluid can be supplied to said member;

said receiver having an outlet passage therein extending from theintermediate section of said receiver passage to a location spaced fromsaid inlet section whereby at least a portion of the fluid returningthrough said intermediate section of said receiver passage flows throughsaid outlet passage; and

at least a region of said intermediate section contiguous said outletsection being of lesser cross-sectional area than a major portion ofsaid outlet section, said outlet section diverging as it extends awayfrom said region of the intermediate section.

14. A combination as defined in claim 13 wherein said outlet passage isshorter than said inlet section.

I 15. A combination as defined in claim 13 wherein said receiver has asecond receiver ,passage extending therethrough, said second receiverpassage having an inlet section adjacent the discharge end of thejet'pipe for receiving fluid from the jet pipe, an outlet section, andanintermediate section intermediate said inlet section and said outletsection, said inlet section of said second receiver passage lyingclosely adjacent the discharge end of the jet pipe:

means for providing a fluid flow path between the outlet section of saidsecond receiver passage and the opposite pressure responsive member andwherein the fluid can return through the receiver, said receivercomprising:

a body having an inner surface defining a receiver passage extendingthrough said body, said body having an outer surface;

said receiver passage having an inlet adjacent the movable member forreceiving fluid from the jet pipe and an outlet for supplying the fluidfrom the jet pipe and an outlet surface; for supplying the fluid to thefluid pressure responsive member, said inlet and outlet being at saidouter surface;

said body defining an outlet passage extending from a region of saidreceiver passage intermediate said inlet and outlet thereof to alocation on the outer surface spaced from said inlet and said movablemember; r i

said outlet passage and said region of said receiver passage beingpositioned so that at least a major portion of the fluid flowing fromthe outlet of said receiver passage .flows through the outlet passagerather than through said inletof said receiver passage; and

said receiver passage being a divergent portion which diverges from'alocation adjacent said region toward said outlet, said outlet'having noless than about the same cross-sectional area as said divergent portionof said receiver passage. I

17. A receiver as defined in claim 16 wherein said outlet passageterminates in an outlet and said outlet passage diverges from a locationsubstantially-at said region toward said last-mentioned outlet saidlast-mentioned outlet having no less than about the same cross-sectionalarea as other portions of said outlet passage.

18. A receiver for a control valve of the type wherein fluid is directedby a movable member toward the receiver to a fluid pressure responsivemember toward the receiver to a fluid pressure responsive member andwherein the fluidcan return through the receiver, saidreceiver'comprising:

a body having an inner surface defining a receiver passage extendingthrough said body, said body having an outer surface; v

said receiver passage having an inlet'adjacent the movable member forreceiving fluid from the jet pipe and an outlet for supplying the fluidto the fluid pressure responsive member, said inlet and outlet being atsaid outer surface;

said body defining an outlet passage extending from a region of saidreceiver passage intermediate said inlet and outlet thereof to alocation on theouter surface spaced from said inlet and said movablemember;

said outlet passage and said region of said receiver passage beingpositioned so that at least a major portion of the fluid flowing fromthe outlet of said receiver passage flows through the outlet passagerather than through said inlet of said receiver passage: and

said outlet passage terminating inan outlet, said outlet passagediverging from said region to said outlet thereof.

1. A receiver for a control valve of the type having movable means forsupplying fluid under velocity head (through the discharge end thereofand) to the receiver to a fluid pressure responsive member and whereinthe fluid can return through the receiver, said receiver comprising: abody including first and second body sections, a platelike divider andmeans for interconnecting said body sections with said dividersandwiched therebetween each of said body sections having a surfaceconfronting said divider and groove means in said surface, said groovemeans of said first and second body sections cooperating with saiddivider to define first and second receiver passages, respectively, andfirst and second outlet passages, respectively; each of said first andsecond receiver passages having an inlet section adjacent the movablemeans for receiving fluid under velocity head therefrom, an outletsection for supplying fluid under pressure to the pressure responsivemember and for receiving return flow of fluid from the pressureresponsive member, and an intermediate section intermediate said inletsection and said outlet section, said first and second receiver passagesterminating at both ends in the outer surfaces of said first and secondbody sections, respectively; and said first and second outlet passagesextending from the intermediate sections of said first and secondpassages, respectively, to locations on the outer surfaces of said firstand second body sections, respectively, and being spaced from said inletsections, said outlet passages conducting return fluid from theassociated intermediate section to the exterior of said body.
 2. Areceiver as defined in claim 1 including a groove formed in the exteriorsurface of said body sections for providing a path of communication onthe exterior of said body between said first and second outlet passages.3. A receiver as defined in claim 1 wherein said first body sectiondefines a first groove in the exterior surface thereof and said firstoutlet passage terminates in said first groove whereby the length ofsaid first outlet passage is reduced.
 4. A receiver as defined in claim1 wherein said outlet section of said first receiver passage terminatesin an outlet at the outer surface of said first body section and thecross-sectional area of said outlet section of said first receiverpassage progressively increases as it extends from the intermediatesection of the first receiver passage to the outlet of said fiRstreceiver passage, said last mentioned outlet being of greatercross-sectional area than the intermediate section of the first receiverpassage at the juncture of such intermediate and outlet sections.
 5. Areceiver as defined in claim 1 wherein said first receiver passage isgenerally rectangular in transverse cross section.
 6. A receiver for acontrol valve of the type having movable means for supplying fluidthrough the receiver to a fluid pressure responsive member and whereinthe fluid can return through the receiver, said receiver comprising: abody having inner surface means defining a receiver passage extendingthrough said body, said body having an outer surface; said receiverpassage having an inlet section adjacent the movable means for receivingfluid therefrom, an outlet section for supplying fluid under pressure tothe pressure responsive member and for receiving return flow of fluidfrom the pressure responsive member, and an intermediate sectionintermediate said inlet section and said outlet section, said inletsection and said outlet section terminating at said outer surface ofsaid body in an inlet and an outlet, respectively; said inner surfacemeans for said body defining an outlet passage extending from saidintermediate section of said receiver passage to a location on the outersurface of said body spaced from said inlet; said inlet and intermediatesections of said receiver passage and said outlet passage being orientedso that fluid flowing from said outlet section through the intermediatesection tends to flow into the outlet passage rather than into the inletsection; and the cross-sectional area of said intermediate section ofsaid receiver passage being smaller than the cross-sectional area ofsaid outlet whereby the static pressure at said intermediate section isrelatively low.
 7. A receiver as defined in claim 6 wherein said innersurface means includes a first surface defining one side of said outletsection, said intermediate section and said inlet section(s), a secondsurface defining the opposite side of said inlet section and a thirdsurface defining one side of said outlet passage, said second and thirdsurfaces intersecting at a preselected zone, said zone and said firstsurface being located so that a line drawn tangent to said first surfaceat said intermediate section at least substantially intersects saidzone.
 8. A receiver as defined in claim 6 wherein the axis of saidintermediate section of said receiver passage is substantially straightand said outlet passage is joined to said intermediate section of saidreceiver passage adjacent the end thereof which is adjacent said inletsection.
 9. A receiver as defined in claim 6 wherein said outlet passageterminates at said location in an outlet, the cross-sectional area ofsaid intermediate section of said receiver passage being less than thecross-sectional area of said last mentioned outlet.
 10. A receiver asdefined in claim 6 wherein said outlet section progressively increasesin cross-sectional area as it extends from said intermediate section tosaid outlet.
 11. A receiver for a control valve of the type havingmovable means for supplying fluid through the receiver to a fluidpressure responsive member and wherein the fluid can return through thereceiver, said receiver comprising: a body having inner surface meansdefining a receiver passage extending through said body, said bodyhaving an outer surface; said receiver passage having an inlet sectionadjacent the movable means for receiving fluid therefrom, an outletsection for supplying fluid under pressure to the pressure responsivemember and for receiving return flow of fluid from the pressureresponsive member, and an intermediate section intermediate said inletsection and said outlet section, said inlet section and said outletsection terminating at said outer surface of said body in an inlet andan outlet, respectively; said inner surface means of said bodY definingan outlet passage extending from said intermediate section of saidreceiver passage to the location on the outer surface of said bodyspaced from said inlet; said inlet and intermediate sections of saidreceiver passage and said outlet passage being oriented so that fluidflowing from said outlet section through the intermediate section tendsto flow into the outlet passage rather than into the inlet section; andthe cross-sectional areas of said inlet section and said intermediatesection are smaller than the cross-sectional area of a portion of theoutlet section adjacent said outlet.
 12. A receiver as defined in claim11 wherein said outlet section progressively increases incross-sectional area as it extends from said intermediate section tosaid outlet, said outlet passage terminates at said location in anoutlet, the cross-sectional area of said outlet passage progressivelyincreases as the outlet passage extends from the intermediate section tosaid outlet of the outlet passage.
 13. A control valve comprising: a jetpipe connectable to a supply of fluid under pressure, said jet pipehaving a discharge end through which the fluid can be emitted; areceiver having a receiver passage extending therethrough, said receiverpassage having an inlet section adjacent the discharge end of the jetpipe for receiving fluid from the jet pipe, an outlet section, and anintermediate section, intermediate said inlet section and said outletsection; means for mounting said receiver and said jet pipe for movementrelative to each other with the discharge end of the jet pipe lyingclosely adjacent said inlet section whereby movement of the jet pipevaries the amount of fluid directed toward the inlet section; a pressureresponsive member; means for providing a fluid flow path between saidoutlet section of said receiver passage and one side of said fluidresponsive member whereby fluid can be supplied to said member; saidreceiver having an outlet passage therein extending from theintermediate section of said receiver passage to a location spaced fromsaid inlet section whereby at least a portion of the fluid returningthrough said intermediate section of said receiver passage flows throughsaid outlet passage; and at least a region of said intermediate sectioncontiguous said outlet section being of lesser cross-sectional area thana major portion of said outlet section, said outlet section diverging asit extends away from said region of the intermediate section.
 14. Acombination as defined in claim 13 wherein said outlet passage isshorter than said inlet section.
 15. A combination as defined in claim13 wherein said receiver has a second receiver passage extendingtherethrough, said second receiver passage having an inlet sectionadjacent the discharge end of the jet pipe for receiving fluid from thejet pipe, an outlet section, and an intermediate section intermediatesaid inlet section and said outlet section, said inlet section of saidsecond receiver passage lying closely adjacent the discharge end of thejet pipe: means for providing a fluid flow path between the outletsection of said second receiver passage and the opposite side of saidfluid responsive member; and said receiver having a second outletpassage therein extending from the intermediate section of said secondreceiver passage to a location spaced from the inlet section of saidsecond receiver passage whereby at least a portion of the fluidreturning through the intermediate section of said second receiverpassage flows through said last-mentioned outlet passage.
 16. A receiverfor a control valve of the type wherein fluid is directed by a movablemember toward the receiver to a fluid pressure responsive member andwherein the fluid can return through the receiver, said receivercomprising: a body having an inner surface defining a receiver passageextending through said body, said body having an outer surface; saidreceiver passage having an inlet adjacent the movable member forreceiving fluid from the jet pipe and an outlet for supplying the fluidfrom the jet pipe and an outlet surface; for supplying the fluid to thefluid pressure responsive member, said inlet and outlet being at saidouter surface; said body defining an outlet passage extending from aregion of said receiver passage intermediate said inlet and outletthereof to a location on the outer surface spaced from said inlet andsaid movable member; said outlet passage and said region of saidreceiver passage being positioned so that at least a major portion ofthe fluid flowing from the outlet of said receiver passage flows throughthe outlet passage rather than through said inlet of said receiverpassage; and said receiver passage being a divergent portion whichdiverges from a location adjacent said region toward said outlet, saidoutlet having no less than about the same cross-sectional area as saiddivergent portion of said receiver passage.
 17. A receiver as defined inclaim 16 wherein said outlet passage terminates in an outlet and saidoutlet passage diverges from a location substantially at said regiontoward said last-mentioned outlet, said last-mentioned outlet having noless than about the same cross-sectional area as other portions of saidoutlet passage.
 18. A receiver for a control valve of the type whereinfluid is directed by a movable member toward the receiver to a fluidpressure responsive member toward the receiver to a fluid pressureresponsive member and wherein the fluid can return through the receiver,said receiver comprising: a body having an inner surface defining areceiver passage extending through said body, said body having an outersurface; said receiver passage having an inlet adjacent the movablemember for receiving fluid from the jet pipe and an outlet for supplyingthe fluid to the fluid pressure responsive member, said inlet and outletbeing at said outer surface; said body defining an outlet passageextending from a region of said receiver passage intermediate said inletand outlet thereof to a location on the outer surface spaced from saidinlet and said movable member; said outlet passage and said region ofsaid receiver passage being positioned so that at least a major portionof the fluid flowing from the outlet of said receiver passage flowsthrough the outlet passage rather than through said inlet of saidreceiver passage; and said outlet passage terminating in an outlet, saidoutlet passage diverging from said region to said outlet thereof.